| Retold Properties Ltd | Real estate | 2021 |
| Retro Cafe 241 Ltd | Hospitality | 2023 |
| Retro London Ltd | Hospitality | 2018 |
| Retro Tiling Ltd | Administrative & support | 2022 |
| Rever Beau Limited | Other services | 2021 |
| Revive & Recycle | Administrative & support | 2012 |
| Revive and Recycle Clearances Limited | Water & waste | 2021 |
| Revive Property Solutions Group Limited | Administrative & support | 2010 |
| Revxtra Ltd | Information & communication | 2026 |
| Rewardassociates Limited | Administrative & support | 2014 |
| Rexlight Properties Limited | Real estate | 1995 |
| Rezilli Productions Ltd | Information & communication | 2020 |
| RF Property Maintenance Ltd | Construction | 2026 |
| Rfim Ltd | Professional & scientific | 2016 |
| RG Chislehurst Limited | Wholesale & retail | 2022 |
| RH Laboratories Limited | Manufacturing | 2026 |
| RH Longevity Limited | Manufacturing | 2026 |
| RHC Installations Limited | Construction | 2024 |
| Rhemosa Konsult Ltd | Real estate | 2013 |
| Rhineoak Limited | Households | 1994 |
| Rhoomes & Extensions Ltd | Construction | 2018 |
| Riba Services Limited | Health & social care | 2014 |
| Rich Consulting Ltd | Information & communication | 2024 |
| Richard Enterprises Ltd | Wholesale & retail | 2019 |
| Richard Faraway Design Ltd | Professional & scientific | 2014 |
| Richard Graves Associates Ltd | Professional & scientific | 2012 |
| Richard Seymour Roofing Services Ltd | Administrative & support | 2011 |
| Richardson-Redhouse Property Partnership LLP | | 2006 |
| Richelle Alissia Aesthetics Limited | Health & social care | 2019 |
| Richfield Enterprises Limited | Construction | 2022 |
| Richmand Productions Limited | Information & communication | 2005 |
| Richmand Projects Limited | Administrative & support | 2004 |
| Richmilho Limited | Hospitality | 2024 |
| Richmond Hair & Laser Ltd | Other services | 2021 |
| Ridgeway Property Services and Maintenance Limited | Households | 2020 |
| Riefield Heating Solutions Ltd | Construction | 2018 |
| Right Click IT Services Ltd | Information & communication | 2015 |
| Rights Media Ltd | Information & communication | 2013 |
| Rigley Building Fabric & Conservation Ltd | Construction | 2026 |
| Rimorchiatore Ltd | Information & communication | 2013 |
| Rinaldo Real Estate Ltd | Real estate | 2022 |
| RIO Baby Boutique Limited | Wholesale & retail | 2024 |
| Rishrudh Property Ltd | Real estate | 2026 |
| Rising Solutions Ltd | Financial services | 2019 |
| Risk and Treasury Limited | Administrative & support | 2010 |
| Risk Assure Partners Ltd | Information & communication | 2023 |
| Risk Neutral Consultancy Ltd | Professional & scientific | 2018 |
| RIT Solutions Ltd | Professional & scientific | 2017 |
| Ritwik Solutions Limited | Information & communication | 2014 |
| River Mile Consultancy Limited | Professional & scientific | 2009 |
| Riverhead Consultancy Limited | Professional & scientific | 2017 |
| Riverview Car and Commercials Ltd | Wholesale & retail | 2021 |
| Rivo Limited | Other services | 2024 |
| Rizco Ltd | Professional & scientific | 2013 |
| Rjan Limited | Construction | 2015 |
| RJB Estimating Ltd | Professional & scientific | 2023 |
| RJB Property Maintenance Limited | Construction | 2025 |
| Rjcomms UK Ltd | Information & communication | 2025 |
| RJS (London) Ltd | Administrative & support | 2017 |
| RKD Real Estate Limited | Real estate | 2020 |
| Rkks Limited | Wholesale & retail | 2025 |
| RKW Automotive Limited | Wholesale & retail | 2014 |
| Rkzl Limited | Real estate | 2022 |
| RLM Business Services Ltd | Professional & scientific | 2014 |
| RM & SM Property Company Limited | Real estate | 2018 |
| RMB Oriental Foods Ltd | Wholesale & retail | 2013 |
| Rmltaurus Limited | Health & social care | 2014 |
| Rmts Property Ltd | Real estate | 2018 |
| RN Digital World Ltd | Information & communication | 2021 |
| RNA Barber Ltd | Other services | 2025 |
| RNA Barber One Limited | Other services | 2026 |
| Ro-Tec Systems Limited | Manufacturing | 2023 |
| Road to 1% Limited | Wholesale & retail | 2025 |
| Roadside Guardian UK Ltd | Wholesale & retail | 2025 |
| Robert Charles Jewellery Limited | Manufacturing | 2021 |
| Robert Fells Property Management Limited | Real estate | 2011 |
| Robin Doran Property Limited | Real estate | 2013 |
| ROBIN360 Ltd | Administrative & support | 2025 |
| Robinson Escott Planning LLP | | 2012 |
| Robust Imports & Exports Ltd | Wholesale & retail | 2025 |
| Robust Networks Ltd | Construction | 2024 |
| ROC Private Clinic Limited | Health & social care | 2014 |
| Rochford Investments Limited | Real estate | 2011 |
| Rock Mason Construction Trading and Contracting Limited | Construction | 2025 |
| Rockabilly Radio Ltd | Wholesale & retail | 2019 |
| Rocketpix Ltd | Information & communication | 2024 |
| Rockhill Aesthetics Ltd | Health & social care | 2019 |
| Rockliffe Rose Ltd | Real estate | 2016 |
| Rockpool Retail Ltd | Wholesale & retail | 2020 |
| Rockwater Real Estate Ltd | Real estate | 2022 |
| Rockwing Limited | Manufacturing | 2024 |
| Roda Investments Ltd | Financial services | 2024 |
| Roesel Place Management Company Limited | Real estate | 2011 |
| ROH Properties Ltd | Real estate | 2025 |
| Rojean Properties Limited | Real estate | 1984 |
| Rolling Smoke Orpington Ltd | Hospitality | 2025 |
| Rolza Limited | Administrative & support | 2018 |
| Rolza Properties Ltd | Real estate | 2020 |
| Romax Marketing & Distribution Ltd | Manufacturing | 1997 |
| Ronel Consultancy Limited | Construction | 2014 |